Decorative watch



FIG. 1 is a front and right side perspective view of a decorative watch showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a right side view;

FIG. 4 is a left side view;

FIG. 5 is a rear view; and,

FIG. 6 is a top plan view.

The broken lines in the drawings are for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a decorative watch, as shown and described. 